Patent
Driving circuit capable of enhancing energy conversion efficiency and driving method thereof
Jing-Chyi Wang,Chi-Ming Chen +1 more
- 28 Apr 2011
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TL;DR: In this paper, a driving circuit includes a switch, a detecting unit, and a current supply unit, which is used for turning on and off of the switch and the detecting unit is used to outputting a switch control signal to the switch.
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Abstract: A driving circuit includes a switch, a detecting unit, and a current supply unit. A first terminal of the switch is used for coupling to a first terminal of a first LED group of a plurality of LED groups and receiving a first voltage, and a third terminal of the switch is used for coupling to a first terminal of a last LED group of the plurality of LED groups. The detecting unit is used for outputting a switch control signal to a second terminal of the switch for controlling turning-on and turning-off of the switch. The current supply unit has a plurality of input current terminals, and a ground terminal coupled to ground, where each input current terminal of the plurality of input current terminals is used for coupling to a second terminal of a corresponding LED group of the plurality of LED groups.
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Citations
Patent
Solid state lighting apparatus and methods of forming
Praneet Athalye,Liqin Ni,Antony Paul Van de Ven,Robert D. Underwood +3 more
- 27 Jan 2012
TL;DR: In this paper, a solid state lighting apparatus can include a substrate having first and second opposing surfaces, where at least one of the opposing surfaces is configured to mount devices thereon, and a string of chip-on-board light emitting diode (LED) sets, can be on the first surface of the substrate and coupled in series with one another.
38
Patent
Solid-state lighting apparatus and methods using current diversion controlled by lighting device bias states
Liqin Ni
- 16 Sep 2011
TL;DR: In this article, a lighting apparatus includes a string of light emitting diode (LED) sets coupled in series, each set including at least one LED, and a plurality of current diversion circuits, respective ones of which are coupled to respective nodes of the string and configured to operate responsive to bias state transitions.
37
Patent
Lighting apparatus using a non-linear current sensor and methods of operation thereof
Joseph P. Chobot
- 15 Nov 2011
TL;DR: In this paper, a lighting apparatus includes a lighting circuit including at least one light-emitting device, e.g., a string of LEDs, and a control circuit configured to control the lighting circuit responsive to the generated forward voltage.
34
Patent
Solid-state lighting apparatus and methods using switched energy storage
Liqin Ni
- 21 May 2012
TL;DR: In this paper, a switching circuit is configured to route current through the least one LED to the at least one charge storage device for a first state of an applied voltage and to discharge the battery via the LED for a second state of the applied voltage.
25
Patent
Driver Circuit Using Dynamic Regulation and Related Techniques
Pranav Raval,Bassem AlNahas,Nai-Chi Lee +2 more
- 29 Aug 2013
TL;DR: In this article, an LED driver circuit selects a regulated voltage value for use in driving one or more LEDs based on the dimming duty cycle, which can be achieved at lower duty cycles, while still achieving enhanced operational efficiency at higher duty cycles.
15
References
Patent
Apparatus, Method and System for Providing AC Line Power to Lighting Devices
Anatoly Shteynberg,Dongsheng Zhou,Harry Rodriguez,Mark Eason,Bradley M. Lehman,Stephen F. Dreyer,Thomas J. Riordan +6 more
- 03 Jun 2010
TL;DR: In this article, an apparatus, method, and system for providing AC line power to lighting devices such as light emitting diodes (LEDs) is described, which consists of a plurality of LEDs coupled in series to form an array of segments of LEDs.
548
Patent
Apparatus, system, and method to manage the generation and use of hybrid electric power
Ken Pearson,Chris Brydon,Guangde Wang,Eugene You +3 more
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TL;DR: In this article, an apparatus, system, and method are disclosed to manage the generation and use of hybrid electric power, and a determination module is used to determine whether electric power from the energy converters 102/104 satisfies the electric load.
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Patent
AC LED lamp involving an LED string having separately shortable sections
Steven Huynh
- 31 Jul 2010
TL;DR: In this paper, an LED lamp includes a rectifier, an integrated circuit and a string of series-connected LEDs, and each power switch is coupled so that it can separately and selectably short out a corresponding one of several groups of LEDs in the string.
92
Patent
Solid state lighting apparatus with compensation bypass circuits and methods of operation thereof
De Ven Antony P. Van,Gerald H. Negley,Michael James Harris,Paul Kenneth Pickard,Joseph P. Chobot,Terry Given +5 more
- 13 Sep 2010
TL;DR: In this paper, a lighting apparatus includes a string of serially connected light emitting devices and a bypass circuit coupled to first and second nodes of the string and configured to variably conduct a bypass current around at least one of the light-emitting devices responsive to a temperature and/or a total current in the string.
88
Patent
Solid-state lighting apparatus and methods using energy storage
Antony Paul Van de Ven,Praneet Athalye +1 more
- 12 Sep 2012
TL;DR: In this article, a lighting apparatus including a plurality of lighting circuits coupled in series is described, where each lighting circuit includes a control circuit configured to selectively provide current to at least one LED and charge storage device coupled to the at least single LED.
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